The Infectious risk has shown little change over the past 12 weeks, showing no notable shift in recent weeks..
Allergy risk activity has held steady over the past 12 weeks in Clark, Illinois.
No Pollution activity has been reported over the past 12 weeks in Clark, Illinois.
Weather risk activity has been trending downward over the past 12 weeks in Clark, Illinois.
Last updated: August 24, 2026
Data refreshed weekly